some others are
www.DigiProofs.com
(my favorite since I work there!), Collages.net, morephotos.com
.
some things to look for
look/feel of site
simplicity of ordering for your clients
integration with your own website (if applicable)
stand-alone / or 'only' integrated with your site
hosting cost - any?, per image?, per event?
cost of service - initial
cost of service - monthly
cost of service - products
cost of service - commission / generally 10% - 18%
client costs - shipping cost
support available? phone? email? expected turn around time?
is service for "professionals only"? or does it also cater to consumers
(all things being equal the former is generally preferable)
.
RickJ